Road scraper



July 25, 1933.

E. L. SCHERMERHORN 1,919,260

ROAD SCRAPER Filed June 13, 1932 3 Sheets-Sheet 2 22 z 2 5 56 A I l 51 v 5 i \nuenfov Eugene Scher merhom'n 15' /5 i fium e y 25, 1933- E. L. SCHERMERHORN 1,919,260

ROAD S CRAPER Filed June 13, 1932 3 Sheets-Sheet 3 lnuen fox' 46 47 Eggem Lchenqev {mom present intention to provide a very of the rotatable mounting Patented July 25, 1 933 EUGENE L. SCHER-MERHOBN, orcownn, MICHIGAN ROAD sonarnn Application filed June 13, 1932. Serial K0. 616,884.

This invention relates to road scrapers and is more particularly concerned with road scrapers adapted to be mounted upon and underneath motor trucks and design-ed so that the scraper blade may be lowered and held by hydraulic power.

It-is a. primary object and purpose of the strong,

durable and substantial roadiscraper unit which may be readily installed'u'pon or applied to the chassis side frame members of a motor truck, and in which the scraper blade maybe forced down against the road surface by hydraulic pressure; and wherein the blade rigidly connected to a rock shaft,

therebeiug provided yielding means to perrnit the blade to ride over rough surfaces or stones inthe road, the rock shaftand the hydraul apparatus moving with the blade when it yieldingly pernntted to. more.

Other objects and purposes together with various novel features of construction, operation and arrangements ofparts for effectively attaining the: ends stated will be un derstood from the following description, taken in connection with the accompanying drawings, in which,

Fig. l is a fragmentary end elevation and partial vertical section of the road scraper of my invention applied to the chassis frame members of a motor truck.

Fig. 2 is a plan View thereof.

Fig. 3 is a fragmentaryplan View of one of the hydraulic cylinder units, two ofwhich preferably are used with the road scraper.

. Fig. dis a rear elevation thereof.

Fig. 5 is a fragmentary vertical section il lustrating the mounting of the hydraulic cylinder and the yielding means for permitting yielding movement of the road scraper blade.

Fig. 6 is a fragmentarylongitudinal vertical section showing the manner in which.

the scraper carrying beam maybe adjusted -to different angular positions, and clamped and secured in any position to which adjusted. 1

Fig. 7 is a fragmentary under plan: View forthe scraper rock shaft,

s Fig. 8 is a fragmentary Vertical section and end elevation of the mountings" used in rotatably mounting the rock shaft on and underneath the supportingor carrying beam therefor. J V

Fig. 9 is a fragmentary elevation illustrating the rock shaft divided and spaced apart at its ends, the two parts being permanent. iy connected by an interposed connecting Fig. 10 isa View illustrating the construction shown in Fig. 9 at right angles to the plane of said Fig. 9 I I Fig. 'll is a transverse section on .theplane of 1l11 of Fig. 9, and f Fig. '12 is a View similarto Fig. 6, illustrating a modification in the vadiustable' clamping mechanism. 1

re ,erence characters refer to like parts inthe different figures of'the drawings.

. Like In the construction of road scraper, the same is adapted to be carried on, underneath and transversely of the side chassis frame members 1 of a motor truck; To each of said frame membersl vertical depending cylindrical posts '2" are connected, the upper ends of the'postsbeing integral with plates 3 which lie alongside of the frame members 1 and are securely yet'adjustably con-- nected thereto by U-bolts 4, shown in Fig. 2.

Arc-shaped bars 5, preferablyr of angle iron, at their ends are formed with sleeves .6 through which the posts 2 may pass, and V terminate in tongues 7 2 Whichmay be bolted tothe adjacent verticalllegs of the members 5 toclamp the sleeves on thep'osts 2 and therebyimake it possible toadjust the bars =5 Vertically for limited distanceswithin the range permittedby. the length of the posts A scraper carrying beam or'hangerboard 8 1s located horizontally underneaththe that shown chassis frame and across and underneath the horizontal flanges of the {arcuate bars 5. Clamping plates 9 each at one end lieabove. the horizontal flanges of the bars 5 (Fig; 6)

j andbolts 10 pass through the beam and the plates. Each: plate 9 carries spaced apart upwardly extending integral ribs '11 which extend beyond the 'other end of the plate lng an eccentric 13rotatably mounted on the pin and from which a handle 14 extends, as

fully shown in Fig. .6. The beam 8 and the mechanism carried thereby, hereafter described, may be adjusted to many different angular positions relative to the lengthiof the truck. In changing positions the handles 14 are turned upwardly, whereupon the clamp plates 9 bearing against the horizontal flanges of the bars 5 are relieved suiiiciently that the beam may be turned to a different po* sition. Then by turning the handles 14 to the position shown in Fig. 6, the clan'iping of the ends of the plates 9 against the bars 5 again occurs, holding the beam 8 secured with respect to said bars 5 on which it is mounted. v

A rock shaft 15 is located lengthwise of and below the beam 8. The beam 8 preferably is of Channel form having an upper horizontal web and downwardly extending flanges, as shown in Fig. 8. A Ushaped member 16 having spaced apart depending legs 16a is designed to fit against the underside of the beam 8 associated with which is an upper half 17 of a bearing, the rock shaft 15 lying between said upper half 17 and the lower half 18 of the hearing. The parts may be assembled in the relation shown in Fig. 8 and bolts passed upwardly through the ends of the bearing and through the downwardly extending legs 16a of the member 16 and thence through the horizontal web of the channel beam receiving nuts at their upper ends.

There are a plurality of these bearing constructions in the lengthof the rock shaft connected to" the beam in the manner'described and serving to support the shaft 15 so that it may'rock or rotate freely. Should, at any time, any of the bearing constructions need replacement due tobreakage, wear or the like, any bearing may be readily removed without necessitating the disconnection of all the bearings and the rock shaft from the beam 8. l Arms 1 9 are permanently secured to the rock shaft 15 by means of cooperating clamping members 20 with bolts 21 passing through the clamps 20 and the adjacent end portions of said arms 19 (Fig. 1). 7 Between the lower or outer end'portions of thearms 19 a supporting plate 22 of metal extends and is permanently secured thereto, to which in turn a scraper blade 23 is secured by bolts; and the blade maybe adjusted a limited distance in or out with respect to the arms 19, the support ing plate 22 having a plurality of series of holes as in Fig. 1), for the bolts which connectthe scraperblade thereto to pass through.

Hydraulic powerunits arejmounted, pref- I 'erably adjacenteach end of the beam 8, and connected with the scraper blade to force the same downward. A fixture of metal having a horizontal web 26. shortdistance above and substantially paralcylinders 30. ends of said cylinders forces the piston rods downwardly and causesthe scraper blade 23 spaced apart sides 24 is pivotally mounted at one end on a block 25 permanently secured to and extending upwardly from the beam 8, the sides 24 being integrally connected by The web 26 is located a lcl to the web of the beam 8 and between the two a filler or washer of rubber 27 is located (Fig. 5). Above the web 26 a heavy block 28 of rubber is placed, and a bolt 29 passes downwardly through the web 26, both rubber members 27 and 28, and the beam 8.

A hydraulic cylinder 30, closed at its upper end is mounted adjacent its lower end on and between the sides 2 l of the member described. Trunnions 31 extend from the cylinder and have mounting in bearings 82 at the lower side and at the free ends of the parts 241-. The cylinder has a piston therein (not shown) from which a piston rod 33 extends, passing out of the lower end of the cylinder and having a pivotal connection at its lower end to 19a extending from an arm (see Fig. 1')

under tension serve to lift the scraper blade when free to do so.

Oil or other suitable hydraulic liquid is pumped by any suitable pumping mechanism, not forming a part of the present invention, through flexible conduits 38 (see Fig. 2) to pipes 89, which lie alongside of the front edge of the beam 8, and which at their outer ends connect with flexible conduits 10 leading to the upper ends of the Pumping oil into the upper to come against the road surface with a pres sure dependent upon the pressure to which the oil is pumped after the edge of the blade engages the road.

In operation, on release of the oil pressure within th'e'cylinders, the force of the springs 36 will force t'ie oil out of the cylinders and through the conduits 410, 39 and. 38

and the scraper blade will be lifted to a substantially horizontal position so as not to engage the road or be likely to strike thereagainst. When the scraper is tobe used Oil is pumped through the conduits 88, 39 and 40 and the scraper forced to its down operativ'e position, as shown in Fig. 1. Should the scraper strike any stones, hard spots in the road or other things which necessitate its lifting to avoid breakage, this is permitted by reason of the connection made from the 42 coincident with such axis, the ends of the v scraper blade through the arin=19, pistonrod:

33 and the piston 30 tothe sides 24-o'fthe fixture previously described, which is per mitted-a limited upward movement by reason of its" pivotal conncctionat one end;

Such movement is resisted by the rubber blocks 28 which are yieldable, however, sufliciently to prevent breakage of the parts, and whichwill automatically act to'return the scraper blade to its operative position I after it has passed over the obstruction.

The construction described is offa very] practical, strong and durable character;

The adjustment of the beam Sis aboutaver-l tical axis midway between the sides and ends of the beam. A radius rod structure indicated at 41 is carried around a pivot bolt radius rod having connection to one end of each of the arcuate members 5. This radius rod construction may be varied in many r spectsand in fact is not absolutely essential and is of minor importance in connection with the present invention.

In Figs. 9 to 12 inclusive,-there is shown a construction whereby the rock shaft 15 does not extend the full length of the scraper carrying beam, but is replaced by two rock shafts 15m in axial alinement witheach other and spaced apart a distance at their adjacent ends. The two rock shafts 150 are connected together byan interposed fiat bar 43 of spring steel insertedat its ends into the ends of the 15a with respect to the otherwith a conse quent twist or distortion of the spring connecting bar 43. It is to be understood that in such case the scraper blade 23 and the supporting plate 22 will likewise be divided between their ends, each of the rock shafts 15a carrying onehalf of thedivided blade and supporting plate. "With such a construction it is possible to rock one of the shafts l5afai= ther than the other and thus bring the blade carried by it with greater pressure against the road surface. i I H In Fig. 12 a slight modification in the clamping structure for adjustably mounting the supporting beam 8 is shown. The eccentric 13 with its supporting handle 14 is replaced by a member comprisinga head13a having an operating handle 14a mounted upon a pivot pin 12a. Instead of the head'13a being mounted eccentrically on' its pivot, it carries a roller 46 at its lower side to-bear against the upper side of the webof the beam 8. With this constructionthe clamp may be released and then again forced to operative position for permitting adjustment of the cylinder connected wi th and holding it in i any position to which. The head 13a is provided with a' adjusted. p shoulder 47-to'control and limi t. its movement and prevent its passing too far or beyond thev position at which the clamping action will be exerted. J;

' j The claims appended hereto define the in- VQilbiOn which islto be consideredcomprehensive of all forms of structure coming within their scope. 1 7

. I claim:

1. In a road scraper construction, a sup porting beam, ascraper blade mounted on said. beam to lie-raised and lowered, a member pi votally mounted at one end thereof on said beam, a hydraulic cylinderpivotally mounted on said member at itsother end, a piston rod extending from said hydraulic cylinder-and connected with the scraperblade and means for yield ingl y holding said pivotally mounted member against movement' away from I the beam. I,

.2. A scraper construction compr1sing,a

. horizontal beam, a scraper carried on' and be-.

lowsaid beam and rotatably' mounted tobe raised, and lowered, a member pivotally mounted at one end on and above said beam,

a rubber block located above said member be-' tween 'i'tsends, a bolt passing downwardly through said riiibbe'r block and beam, where-' by said member is yieldin'gly held against movement away from the beam, and'hy draulic piston cylinder apparatus rocking'ly mounted at the opposite end of said member,

the piston rod of said hydraulic apparatus,

connecting with the scraper. I

3. A construction containing the elements in combination defined in claim'Q, combined with springs-under tension extending between said scraper blade and the hydraulic cylinder, said springs be ng tensioned and elongated on downward extension. of the.

piston rod from the cylinder. V

4. A scraper construction comprising a horizontal beam, a rock shaft mounted on and below the beam, rigid arms seeuredto and extending from the rock shaft, a scraper blade carriedby said arms, a member having spaced aiartsides and an integral horizontal web connecting the sides located above the beam, means pivotally connecting one end of said member to the beam, yielding compression means located on and above the web, a 'i'od'passing through said yielding compres- Fl O11 I116 !.I1S, web-and beam, a hydraulic cyl- *i'ndern'iounte d for rocking movement at the free end of said member between the sides thereof, and a piston rodextensible from said an arm carrying the scraper blade.

5. A construction containing the elements I in comb nation defined'in' claim-4 combined with a cross bar secured to the upper, end of the cylinder, coiledtensionsprings connected one at each end to eachend of said bar and extending downwardly in parallel relation to the cylinder and piston rod and means for -ber seatedagainst each of said U-shaped members, a lower bearing member located agalnst the upper bearing member, a rock "shaft between the bearing members, bolts passing through the ends of the bearing members and through the'legs of said U-shaped member and the web of the channel member,

and a scraper blade carried by said rock shaft.

I 7. A road scraper construction comprising,

' a supporting beam, a scraper blade carriedby said beam and mounted for raising and lower-- ing, a hydraulic piston cylinder mechanism connected with the blade for lowering the same and for holding it with pressure against a road, means for movabiy mounting the hydraulic apparatus on the beam, comlnned with rubber yielding means for normally resisting movement of the scraper away from the road when it is in its lower position, but yielding to permit the blade to pass over obstructions. Y I

8. In aroad scraper construction, a chassis frame, a road scraper blade carried on, below and transverse of the frame, means .for

mounting said blade for turning movement tions in av -road when in -.position. i

about a horizontal axiswhereby it may beraised or lowered, a hydraulic cylinder, a piston rod extensible from said cylinder connected to said blade, a movably mounted supporting means carrying said hydraulic cyl 'inder, and a rubber block associated with said. cylinder carrying means com n'essible to permit the scraper blade to pass over obstruc- 9. Ina roadscraper constrin'ztioina chassis frame, a roar scraper blade mounted on, carried-by and located transversely below the chassis frame,'nieans for mounting said blade for turning about a horizontal axis whereby the same may be raised or lowered, a piston rod connected with the blade, a hydraulic cylinder into which said piston rod-extends, a supporting member for the cylinder carry ing the same on which the cylinder is mounted to turn about a horizontal axis, means for mounting said supporting member to turn about a horizontal axis, and yielding means acting on said supporting member resisting 7 movement of the scrap-er bla-de away from the road when in its lowerposition but yielding to permit passage of the blade over obstructions. r

10. A road scraper construction comprising, a siuj porting beam,two rock shafts rotatably mounted en-and underneath the beam, arms extending from the rock shafts, scraper blades secured to said arms, hydraulic power means connected with said arms to move the sameand yielding means interposed between said rock shafts for the purposes described.

EUGENE L. SCHERMERHORN.

its lower operative 

